General

  • Target

    1dd45a1200496700a9a9e138a0ecf1625c981855159ceb8624fe69b8bcfe3bb5.exe

  • Size

    15.0MB

  • Sample

    240525-bgkj9shd48

  • MD5

    4cbc670c79dddc759b63ded7f36a80e1

  • SHA1

    7bf50c94959846e1c7caf521e697ee2367aabf01

  • SHA256

    1dd45a1200496700a9a9e138a0ecf1625c981855159ceb8624fe69b8bcfe3bb5

  • SHA512

    6bc15e6acbfdcf09e5eefc1fcc02e997ae81c2b9bcbf02df78ba6c3db8c8620130880fa2d6e49a1b3a9e7df2b4f5e428d8cb4326e6679d9e0639dc40ce099535

  • SSDEEP

    24576:y6nVMk+HIj90cmvFMN8O6TXQRfAGWEUAxqnRAIsJumwocd5xShmC+a+OPj:xVz7tWqKTXQiTpsJr/Qx8ec

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

b64c611.ddnss.eu:3154

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    uytrs.exe

  • copy_folder

    iu7y6tr

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    false

  • keylog_crypt

    true

  • keylog_file

    u8tus.dat

  • keylog_flag

    false

  • keylog_folder

    87y6trf

  • mouse_option

    false

  • mutex

    OIUGH6-BFBAXD

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot7062583539:AAFQjFwRQkLApxa503ZXmcd2CJhJK5Vjupw/

Targets

    • Target

      1dd45a1200496700a9a9e138a0ecf1625c981855159ceb8624fe69b8bcfe3bb5.exe

    • Size

      15.0MB

    • MD5

      4cbc670c79dddc759b63ded7f36a80e1

    • SHA1

      7bf50c94959846e1c7caf521e697ee2367aabf01

    • SHA256

      1dd45a1200496700a9a9e138a0ecf1625c981855159ceb8624fe69b8bcfe3bb5

    • SHA512

      6bc15e6acbfdcf09e5eefc1fcc02e997ae81c2b9bcbf02df78ba6c3db8c8620130880fa2d6e49a1b3a9e7df2b4f5e428d8cb4326e6679d9e0639dc40ce099535

    • SSDEEP

      24576:y6nVMk+HIj90cmvFMN8O6TXQRfAGWEUAxqnRAIsJumwocd5xShmC+a+OPj:xVz7tWqKTXQiTpsJr/Qx8ec

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

    • Detect packed .NET executables. Mostly AgentTeslaV4.

    • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects executables referencing Windows vault credential objects. Observed in infostealers

    • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

    • Detects executables referencing many email and collaboration clients. Observed in information stealers

    • Detects executables referencing many file transfer clients. Observed in information stealers

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

3
T1552.001

Credentials in Registry

1
T1552.002

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

4
T1005

Tasks